Because the group, also known as ISIL, has “amassed wealth at an unprecedented pace” from different sources than most terror groups, it presents a particular challenge to the US and its allies working to choke off money flows.”We have no silver bullet, no secret weapon to empty ISIL’s coffers overnight. This will be a sustained fight, and we are in the early stages,” Cohen said.He is among a team of Obama administration officials leading the fight against the Islamic State IS group, seeking to get allies, including Gulf countries, on board.IS is now “considered the world’s wealthiest and most financially sophisticated terrorist organization,” said Marwan Muasher, vice president at the Carnegie Endowment for International Peace.
via Islamic State militants now world's richest – Yahoo News.